diff --git a/Dockerfile.site b/Dockerfile.site
index bad5b38..606d752 100644
--- a/Dockerfile.site
+++ b/Dockerfile.site
@@ -3,11 +3,11 @@ FROM  --platform=$BUILDPLATFORM squidfunk/mkdocs-material as build
 WORKDIR /build
 RUN mkdir -p /build/docs
 COPY README.md /build/docs/index.md
+COPY site/styles.css /build/docs/stylesheets/extra.css
 COPY site/ /build/
 
 RUN \
   sed -i 's|^.*/workflows/ci.yml.*$||' /build/docs/index.md  && \
-  cat /build/styles.html >> /build/docs/index.md && \
   sed -i 's|https://raw.githubusercontent.com/umputun/reproxy/master/site/logo-bg.svg|logo.png|' /build/docs/index.md
 RUN mkdocs build
 COPY site/favicon.svg /build/site/
diff --git a/site/mkdocs.yml b/site/mkdocs.yml
index d4755ec..b562728 100644
--- a/site/mkdocs.yml
+++ b/site/mkdocs.yml
@@ -23,6 +23,9 @@ theme:
     - content.code.annotate
     - navigation.sections
 
+extra_css:
+  - stylesheets/extra.css
+
 plugins:
   - search
   - minify:
@@ -72,4 +75,5 @@ markdown_extensions:
       alternate_style: true
   - pymdownx.tasklist:
       custom_checkbox: true
-  - pymdownx.tilde
\ No newline at end of file
+  - pymdownx.tilde
+
diff --git a/site/styles.html b/site/styles.css
similarity index 86%
rename from site/styles.html
rename to site/styles.css
index 0255808..387823e 100644
--- a/site/styles.html
+++ b/site/styles.css
@@ -1,4 +1,3 @@
-<style>
 .md-typeset h1,
 .md-content__button {
     display: none;
@@ -6,4 +5,3 @@
 .md-header__topic {
     display: none;
 }
-</style>
\ No newline at end of file